package com.example.demo.config;

import com.example.demo.common.AppVariable;
import com.example.demo.entity.Userinfo;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * @Author :蕉绿
 * @Date : 2023/3/14 20:58
 * @Version : V1.0
 * @Description :
 */
//拦截器
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        HttpSession session = request.getSession(false);
        if(session != null && session.getAttribute(AppVariable.USER_SESSION_KEY ) != null) {
            //用户已登录
            System.out.println("当前用户为:" +
                    ((Userinfo)session.getAttribute(AppVariable.USER_SESSION_KEY )).getUsername());

            return true;
        }
        response.sendRedirect("/login.html");
        return false;

    }
}
